Master-oscillator power-amplifier quantum cascade laser array

We report on the demonstration of an array of master-oscillator power-amplifier quantum cascade lasers (QCLs) operating in single-mode at different wavelengths between 9.2 and 9.8 μm. In each device, the output of a distributed feedback QCL is injected into a tapered QCL section which acts as an amp...

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Bibliographic Details
Published in:Applied physics letters 2012-12, Vol.101 (26)
Main Authors: Rauter, P., Menzel, S., Goyal, A. K., Gökden, B., Wang, C. A., Sanchez, A., Turner, G. W., Capasso, F.
Format: Article
Language:English
Subjects:
Amplifiers
Arrays
Beams (radiation)
Devices
Quantum cascade lasers
Spectroscopy
Spreading
Wavelengths
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Summary:We report on the demonstration of an array of master-oscillator power-amplifier quantum cascade lasers (QCLs) operating in single-mode at different wavelengths between 9.2 and 9.8 μm. In each device, the output of a distributed feedback QCL is injected into a tapered QCL section which acts as an amplifier while maintaining a high beam quality due to adiabatic mode spreading. All array elements feature longitudinal as well as transverse single-mode emission at peak powers between 0.8 and 3.9 W at room temperature. The high output power and excellent beam quality render the array highly suitable for stand-off spectroscopy applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4773377